Zimone, Mystery Unraveler costs {2}{G}{U}. Whenever a land enters under your control, you manifest dread if it is the first time this ability has resolved this turn, and otherwise you may turn a permanent you control face up. Manifest dread looks at the top two cards, puts one onto the battlefield face down as a 2/2 and the other into your graveyard. Every land drop is a creature, and every extra land turns one face up.

The precon already has the manifesters and the landfall payoffs, including They Came from the Pipes, Yedora and Aesi, Tyrant of Gyre Strait. Each swap below pairs a cut with an add, and every card is scored with the same numbers the Oracle uses to build decks: synergy and inclusion from the Zimone decks, plus lift, which shows how much more often a card turns up in these decks than in decks that could play it.

Looking for the unmodified list first? Read the Jump Scare! precon guide.

13
Swaps
$26.19
Cost of the adds
38→38
Lands
10→42
Avg Oracle score

What is holding the deck back

Not enough cheap manifest dread

Threats Around Every Corner, Hauntwoods Shrieker and Valgavoth's Onslaught each manifest dread, and Paranormal Analyst and Vannifar make the face-down creatures better. They are among the top-scoring cards the precon leaves out.

Cards that do nothing with face-down creatures

Giggling Skitterspike, Kefnet the Mindful, Kianne, Skaab Ruinator, Biomass Mutation and Body of Knowledge do not manifest, turn anything face up or reward it. Most are played in about one Zimone deck in six or fewer.

A top-heavy deck

Fourteen nonland cards have a mana value of six or more, including Dig Through Time at eight mana and Greater Tanuki. Manifest dread works best when the early turns each make a creature.

The 13 swaps

Each pair shows the numbers for the card coming out and the card going in. Click a card image to zoom.

Swap 1 of 13
Giggling Skitterspike
Cut
Giggling Skitterspike
Artifact Creature — Toy · 4
Not a card this commander's decks usually play, so it scores below the cards that are
Threats Around Every Corner
Add
Threats Around Every Corner
Enchantment · 3G
Inclusion73%
Synergy69%
Lift8.0×+
Oracle score 71

Giggling Skitterspike is a four-mana indestructible 1/1 artifact creature that pings opponents when it attacks, blocks or is targeted. It is not a card Zimone decks usually play.

Threats Around Every Corner costs {3}{G}: when it enters you manifest dread, and whenever a face-down permanent enters under your control you search for a basic land and put it onto the battlefield tapped. Every manifest ramps you, and every land is a landfall trigger. It is the highest-scoring card the precon leaves out.

Swap 2 of 13
Kefnet the Mindful
Cut
Kefnet the Mindful
Legendary Creature — God · 2U
Not a card this commander's decks usually play, so it scores below the cards that are
Paranormal Analyst
Add
Paranormal Analyst
Creature — Human Detective · 1U
Inclusion63%
Synergy60%
Lift8.0×+
Oracle score 61

Kefnet the Mindful is a 5/5 flying, indestructible God for {2}{U} that cannot attack or block unless you have seven or more cards in hand. It is not a card Zimone decks usually play.

Paranormal Analyst costs {1}{U}: whenever you manifest dread, you put a card you put into your graveyard this way into your hand. Every manifest is a free card, and Zimone manifests every turn.

Swap 3 of 13
Kianne, Corrupted Memory
Cut
Kianne, Corrupted Memory
Legendary Creature — Illusion · 2GU
Not a card this commander's decks usually play, so it scores below the cards that are
Hauntwoods Shrieker
Add
Hauntwoods Shrieker
Creature — Beast Mutant · 1GG
Inclusion58%
Synergy56%
Lift8.0×+
Oracle score 57

Kianne, Corrupted Memory is a 2/2 that gets a counter whenever you draw and gives flash to spells depending on whether its power is even or odd. It is not a card Zimone decks usually play.

Hauntwoods Shrieker is a 3/3 for {1}{G}{G}: whenever it attacks you manifest dread, and for {1}{G} you reveal a face-down permanent and may turn it face up if it is a creature. A three-drop that makes a creature every attack.

Swap 4 of 13
Skaab Ruinator
Cut
Skaab Ruinator
Creature — Zombie Horror · 1UU
Not a card this commander's decks usually play, so it scores below the cards that are
Vannifar, Evolved Enigma
Add
Vannifar, Evolved Enigma
Legendary Creature — Elf Ooze Wizard · 2GU
Inclusion48%
Synergy46%
Lift8.0×+
Oracle score 46

Skaab Ruinator is a 5/6 flier for {1}{U}{U} that needs three creature cards exiled from your graveyard as an additional cost. It is not a card Zimone decks usually play.

Vannifar, Evolved Enigma is a 3/4 for {2}{G}{U}. At the beginning of combat each turn you either cloak a card from your hand (a face-down 2/2 with ward {2}) or put a +1/+1 counter on each colorless creature you control. A second engine that makes face-down creatures and grows them.

Swap 5 of 13
Biomass Mutation
Cut
Biomass Mutation
Instant · XG/UG/U
Inclusion12%
Synergy8%
Lift2.8×
Oracle score 9
Secret Plans
Add
Secret Plans
Enchantment · GU
Inclusion41%
Synergy39%
Lift8.0×+
Oracle score 40

Biomass Mutation sets your creatures' base power and toughness to X/X until end of turn for {X}{G/U}{G/U}. It is played in about one Zimone deck in eight.

Secret Plans costs {G}{U}: your face-down creatures get +0/+1, and whenever a permanent you control is turned face up you draw a card. Zimone turns permanents face up, and each one is a card.

Swap 6 of 13
Simic Signet
Cut
Simic Signet
Artifact · 2
Inclusion29%
Synergy1%
Lift1.0×
Oracle score 12
Valgavoth's Onslaught
Add
Valgavoth's Onslaught
Sorcery · XXG
Inclusion28%
Synergy26%
Lift8.0×+
Oracle score 27

Simic Signet is a two-mana rock, in a deck with Arcane Signet, Sol Ring and mana creatures.

Valgavoth's Onslaught costs {X}{X}{G}: manifest dread X times, then put X +1/+1 counters on each of those creatures. At X=2 it is five mana for two big creatures, and a late-game finisher.

Swap 7 of 13
Cackling Counterpart
Cut
Cackling Counterpart
Instant · 1UU
Inclusion13%
Synergy10%
Lift4.5×
Oracle score 12
Experiment Twelve
Add
Experiment Twelve
Creature — Elf Lizard Warrior · 3G
Inclusion26%
Synergy24%
Lift8.0×+
Oracle score 25

Cackling Counterpart is a three-mana copy of a creature you control, with flashback for seven. It is played in about one Zimone deck in eight.

Experiment Twelve is a 4/4 trampler for {3}{G}. Whenever it or another creature you control is turned face up, you put +1/+1 counters on that creature equal to its power, and it has disguise {4}{G}. Every face-up turn doubles a creature.

Swap 8 of 13
Greater Tanuki
Cut
Greater Tanuki
Enchantment Creature — Dog · 4GG
Inclusion14%
Synergy13%
Lift8.0×+
Oracle score 13
Oblivious Bookworm
Add
Oblivious Bookworm
Creature — Human Wizard · GU
Inclusion22%
Synergy21%
Lift8.0×+
Oracle score 21

Greater Tanuki is a 6/5 trampling Dog enchantment creature for {4}{G}{G}, with a channel that fetches a basic land. It is played in about one Zimone deck in seven.

Oblivious Bookworm is a 2/3 for {G}{U}. At your end step you may draw a card, and you discard a card only if no permanent entered face down or turned face up this turn. With Zimone, that is nearly always a free draw.

Swap 9 of 13
Body of Knowledge
Cut
Body of Knowledge
Creature — Avatar · 3UU
Inclusion17%
Synergy14%
Lift7.2×
Oracle score 15
Rampaging Baloths
Add
Rampaging Baloths
Creature — Beast · 4GG
Inclusion35%
Synergy21%
Lift2.4×
Oracle score 26

Body of Knowledge is a five-mana creature whose size is the number of cards in your hand, and it has no maximum hand size. It is played in about one Zimone deck in six.

Rampaging Baloths costs {4}{G}{G}: it has trample and landfall, so whenever a land enters under your control you create a 4/4 Beast. Every land drop is a 4/4 and a manifest.

Swap 10 of 13
Dig Through Time
Cut
Dig Through Time
Instant · 6UU
Inclusion18%
Synergy14%
Lift5.1×
Oracle score 16
Uro, Titan of Nature's Wrath
Add
Uro, Titan of Nature's Wrath
Legendary Creature — Elder Giant · 1GU
Inclusion34%
Synergy25%
Lift3.9×
Oracle score 28

Dig Through Time costs {6}{U}{U} with delve. It digs seven cards deep, and is played in about one Zimone deck in six. The graveyard it eats is the one you fill with manifest dread.

Uro, Titan of Nature's Wrath costs {1}{G}{U}: when it enters you sacrifice it unless it escaped, and whenever it enters or attacks you gain 3 life, draw a card and may put a land onto the battlefield. A land drop for every cast and every escape, which is a landfall trigger for Zimone.

Swap 11 of 13
Citanul Hierophants
Cut
Citanul Hierophants
Creature — Human Druid · 3G
Inclusion15%
Synergy14%
Lift8.0×+
Oracle score 14
Abhorrent Oculus
Add
Abhorrent Oculus
Creature — Eye · 2U
Inclusion54%
Synergy52%
Lift8.0×+
Oracle score 53

Citanul Hierophants ({3}{G}) is one of the lowest-scoring cards in the precon, at 14 in the Oracle: it is in 15% of Zimone decks with 14% synergy. It reads: Creatures you control have "{T}: Add {G}."

Abhorrent Oculus ({2}{U}) scores 53: it is in 54% of Zimone decks with 52% synergy. It reads: As an additional cost to cast this spell, exile six cards from your graveyard. Flying. At the beginning of each opponent's upkeep, manifest dread.

Swap 12 of 13
Rashmi, Eternities Crafter
Cut
Rashmi, Eternities Crafter
Legendary Creature — Elf Druid · 2GU
Inclusion19%
Synergy16%
Lift5.9×
Oracle score 17
Ancient Greenwarden
Add
Ancient Greenwarden
Creature — Elemental · 4GG
Inclusion53%
Synergy46%
Lift7.2×
Oracle score 49

Rashmi, Eternities Crafter ({2}{G}{U}) is one of the lowest-scoring cards in the precon, at 17 in the Oracle: it is in 19% of Zimone decks with 16% synergy. It reads: Whenever you cast your first spell each turn, reveal the top card of your library. You may cast it without paying its mana cost if it's a spell with lesser mana value.

Ancient Greenwarden ({4}{G}{G}) scores 49: it is in 53% of Zimone decks with 46% synergy. It reads: Reach. You may play lands from your graveyard. If a land entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Swap 13 of 13
Oversimplify
Cut
Oversimplify
Sorcery · 3GU
Inclusion23%
Synergy18%
Lift4.7×
Oracle score 20
Harrow
Add
Harrow
Instant · 2G
Inclusion46%
Synergy35%
Lift4.1×
Oracle score 39

Oversimplify ({3}{G}{U}) is one of the lowest-scoring cards in the precon, at 20 in the Oracle: it is in 23% of Zimone decks with 18% synergy. It reads: Exile all creatures. Each player creates a 0/0 green and blue Fractal creature token and puts a number of +1/+1 counters on it equal to the total power of creatures they.

Harrow ({2}{G}) scores 39: it is in 46% of Zimone decks with 35% synergy. It reads: As an additional cost to cast this spell, sacrifice a land. Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

The full swap list

Cut

  • Giggling Skitterspike
  • Kefnet the Mindful
  • Kianne, Corrupted Memory
  • Skaab Ruinator
  • Biomass Mutation
  • Simic Signet
  • Cackling Counterpart
  • Greater Tanuki
  • Body of Knowledge
  • Dig Through Time
  • Citanul Hierophants
  • Rashmi, Eternities Crafter
  • Oversimplify

Add

  • Threats Around Every Corner
  • Paranormal Analyst
  • Hauntwoods Shrieker
  • Vannifar, Evolved Enigma
  • Secret Plans
  • Valgavoth's Onslaught
  • Experiment Twelve
  • Oblivious Bookworm
  • Rampaging Baloths
  • Uro, Titan of Nature's Wrath
  • Abhorrent Oculus
  • Ancient Greenwarden
  • Harrow

What to keep

These cards are doing the deck's heavy lifting. Do not cut them.

If you want to spend more

These are strong but sit outside a budget upgrade. Prices are the cheapest paper printing.

The verdict

Jump Scare! already has the landfall and the face-down creatures. The upgrade is more cheap manifest dread, more payoffs for turning permanents face up, and fewer cards that do nothing with them. These thirteen swaps cost about $26 in total.

Want a full 100-card list built around Zimone, Mystery Unraveler from today's data?

Build with The Oracle →

Frequently asked questions

What are the best upgrades for the Jump Scare! precon?

Using data from 14,874 Zimone decks, the highest-scoring additions are Threats Around Every Corner (for Giggling Skitterspike), Paranormal Analyst (for Kefnet the Mindful) and Hauntwoods Shrieker (for Kianne, Corrupted Memory). The full list has 13 swaps, each scored with synergy, inclusion and lift.

How much does it cost to upgrade Jump Scare!?

All 13 swaps cost about $26.19 at the cheapest paper printings (TCGplayer market prices via Scryfall, 2026-10-27). If you want to spend more, the guide also covers Verdant Kraken ($2.71), Koma, Cosmos Serpent ($4.23) and Hedge Shredder ($2.45).

What should I cut from Jump Scare!?

The weakest cards for this commander are Giggling Skitterspike, Kefnet the Mindful and Kianne, Corrupted Memory. The guide explains the reason for every cut, and swaps each one for a card that scores higher.

Which cards should I keep in Jump Scare!?

Keep They Came from the Pipes, Yedora, Grave Gardener, Ashaya, Soul of the Wild, Scroll of Fate and Aesi, Tyrant of Gyre Strait. These are the cards doing the deck's heavy lifting.

What does Zimone do?

Zimone, Mystery Unraveler costs {2}{G}{U}. Whenever a land enters under your control, you manifest dread if it is the first time this ability has resolved this turn, and otherwise you may turn a permanent you control face up. Manifest dread looks at the top two cards, puts one onto the battlefield face down as a 2/2 and the other into your graveyard. Every land drop is a creature, and every extra land turns one face up.

More Duskmourn Commander upgrade guides

All precon upgrade guides

How the numbers work

Inclusion is the share of Zimone, Mystery Unraveler decks (14,874 of them when this was written, 2026-10-27) that play the card. Synergy is how much more often they play it than other decks in the same colours. Oracle score is synergy × 0.6 plus inclusion × 0.4, the same blend The Oracle uses to rank cards for a deck. Lift compares how often the card appears in these decks with how often it could, capped at 8× here; it is shown for context and does not change the score.

Two cautions. Players who run the precon unmodified count as Zimone decks, which flatters every card the precon contains. Lift is very high for many manifest dread cards because they are new and rarely played outside this kind of deck, so use lift to compare cards, not to judge one in isolation. A card the commander's decks do not usually play counts as 0 in the average score. Prices are the cheapest non-foil paper printing on TCGplayer (via Scryfall), in USD, and move daily.